Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x2"   was replaced by   "x^2". 

Step  1  :

Equation at the end of step  1  :

  20x -  22x2

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   20x - 4x²  =   -4x • (x - 5) 

Final result :

  -4x • (x - 5)